Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2017

Selected Quarterly Financial Data (Unaudited) [Abstract]

Selected Quarterly Financial Data (Unaudited)

The unaudited selected quarterly financial data for the years ended December 31, 2017 and 2016 were:

	Quarter
	First		Second		Third		Fourth
Revenue
2017	$	3,587.4	$	3,790.1	$	3,719.5	$	4,176.6
2016	3,499.1		3,884.9		3,791.1		4,241.8
Operating Expenses
2017	3,177.5		3,224.6		3,255.3		3,556.5
2016	3,107.0		3,323.1		3,338.0		3,639.9
Operating Profit
2017	409.9		565.5		464.2		620.1
2016	392.1		561.8		453.1		601.9
Net Income - Omnicom Group Inc.
2017	241.8		328.6		263.6		254.4
2016	218.4		326.1		253.8		350.3
Net Income Per Share Omnicom Group Inc. - Basic
2017	1.03		1.41		1.14		1.10
2016	0.90		1.36		1.06		1.47
Net Income Per Share Omnicom Group Inc. - Diluted
2017	1.02		1.40		1.13		1.09
2016	0.90		1.36		1.06		1.47